Ask for a photo of the back of the watch. It lists the series (e.g., Series 9), case size (e.g., 45mm), and material (e.g., Aluminum vs. Stainless Steel).
Buying an Apple Watch on Craigslist can net you a great deal, but it requires a bit of "detective work" to avoid ending up with a high-tech paperweight. 1. The Pre-Screen (Before You Meet) buying apple watch on craigslist
Avoid sellers who insist on shipping or paying via Zelle/CashApp before you see the item. Stick to cash in a public place. 4. Safety First Ask for a photo of the back of the watch